File cutter



1,474,720 s. KARPAL FILE CUTTER Nov. 20, 1923.

Filed Oct. 19. 1922 i 2 Sheets-Sheet l wat I Nov. 20, A1923.

1,474,720 s. KARPAI.

FILE GUTTER Filed oct. 19, 1922 2 shets-sheet 2 Patented Nov. 2G, 1923.

i narran 'STATES 'f 11,474,7aa

PATENT OFFICE.

SAM KARPA., OF HOLMESBURG, PENNSYLVANIA, .ASSgGrlYl'Oli',4 OF ONE-HALF T0 JOHN l ZACH, OF PHILADELPHIA,"PENNSYLVANIA;

. FILE CUTTER. j.

Application filed 0ctober'119, 1922. Serial No. 595,577. l

To all whom t may con-oem: v f Be it known thatl, SAM KARPAL, a subject of the King of Italy, residing at Holmesmoved upwardly and struck upon opposite,

faces thereof by cuttingA members for forining the file teeth thereon.

\ Another object of the invention is to provide a novel type of support for thelower end of the file blank, the support being associated with a worm shaft to be moved upwardly thereby, means being associated with f said support for frictionally holding the same into engagement with the worm shaft and capable of operation to permit this association between the support and Vworm shaft andvto permit manual vertical shifting of said support.

A still further object of the invention is to provide laterally adjustable supporting.

frames for the file cutters, said le cutters being resiliently mounted in their support and capable of adjustment for varying the tension thereon and alsoV the striking force thereof.

With the above and other objects in view, Y the invention consists of the novel form, combination and arrangement of parts hereinafter more fully described, shown in the ac- Y companyiug drawings and claimed.

In the drawings, wherein like reference characters designate corresponding parts throughout the several views,

Figure 1 is a vertical side elevational view of a file cutting machine constructed in accordance with the present invention showing the worin shaft operating the support.

for the iile blank, the tension devices for holding the support in engagementwith the worm shaft, and the laterally adj ustablefile cutter, Y l n j Figure 2 is a fragmentary top plan View of the vmachine showingithe laterally acljustable support for the file cutters and the resilient mounting for the lecutters, i

Figure 3 is a horizontal sectional view taken on line III-III lof Fig. 1 with the base frame omitted,

Figure 4 is a horizontal sectional view taken on lineI'VfIV ofFig. 1 showing the file support and 'the' wind shaft for elevating the same, i

Figure 5 is a detail sectional view taken on line V--V of Fig." 1 showing the striker arm on the cross shaft for retracting the tile cut-` ter against the ,spring tension thereon and the adjustable mounting for the lfile cutter Y' support.

Figure 6 is a detail sectional .view of a portion of the windshaft and le support, and

Figure 7 is a detail sectionalfview taken on. line VII-VIIof F ig.`6.

Referring more in detail to the accompanying drawings, there is illustrated Va file cutting machine embodying a frame havingI a base supporting stand 1, preferably of rectangular formationV in 'plan view as illustrated in F ig.v 1, thetile cutting and other mechanism being supported upon the base 1.

A framestructure mounted on the base supportl embodies perpendicular end bars 2` and spaced intermediate perpendicular bars 3 and 4, the bar 4 being .verticallyr slotted 4as shown kin Fig. 4 withvrack teeth4a provided on the opposite vertical walls of said slot.l `A;

cross brace 5 connects the perpendicular bars 2, 3 and 4 adjacent the lower ends thereof while oppositelyeXtending .horizontal arm sections 6 respectively connect theyfintermediate perpendicularrbars 3 and 4 *to. V

the` adjacent end-barsQ as cleai'ly shown in` Fig. 1. v

The. iile, support and mechanism for elevating the same embodies a horizontal power shaftl 7 journaled through one of the end bars 2 as at -8, and further jo'urnaledV in 1 standards 9 and`10, has a'loose pulley- 11 and a fixed pulley 12 associatedtherewith. A

14 between the perpendicular .barsQ and 3 has a worm portionk 15 disposed between the ing a fixed 'pinion 16 thatfmeshes with a y10o Y perpendicular shaft 13 journaled in bearings 5 pinion 17 upon the adjacent end of ther power shaft 7. .The support for the file blank F embodies a block 18 having a socket 18a at the upper side -thereof for supporting the lower end of the file F, the supporting block 18 being positioned between the intermediate perpendicular Lbars 3 and 4 and being formed integral with the rectangular frame 19 that inclosesthe bar 3. As shown more clearly in Figs. 1, 6 and 7 an arm 2O carried by the rectangular frame 19 and eX- tending laterally thereof has a head 21 swiveled thereto as at 22, the head carrying a projecting pin 23y that extends into the grooves of the spiral gear 15. The support for the opposite end of the block 18 embodies a relatively short cylinder 24 that rotatably receives the projecting pin 25 from the file supporting block 18, the cylinder 24 being provided with peripheral gear teeth 26 that mesh with the rack teeth 4a upon one wall of the slot formed in the perpendicular bar 4. It will therefore be seen that upon rotation ofthe power shaft 7, the wornr 15 is rotated and the connections above described between said worm and the file supporting block 18 will effect a vertically shifting movement of said block with the [ile F supported therein.

In order to maintain operative connections between the pins 23 carried by the frame arm 20 and the worm 15, a perpendicular arm 27 having angularly bent ends 28 positioned between spaced guide ianges 29 carried by the cross brace 5 and the armi section 6 at that side of the machine vframe opposite the worm 15. A coil spring 3() is interposed bet-Ween each end ofthe arm 27 and the bar 4V as shown in Fig. 1 that tend to move the arm 27 laterally of the machine frame forl disengagement with the adjacent end of the cylinder 24 associated with the file supporting block 18. A shaftr31 swiv-` eled at one end in the arm 32 is threaded through a bearing 33 carried by the perpendicular end bar 2 and provided upon the outer end thereof with a hand wheel 34, axial inward movement of the shaft 31 moving the arm 27 against the tension of the springs 30 for frictionally engaging the cylinder 24 to shift the'fle supporting block and arm 20 to move the pin 23 into en-M gagement with the groove in the worm 15.

A lever rod 35 extends through the rectangular frame 19 of the file supporting mechanism and is pivoted at its lower end as at 36 to the cross brace 5, the upper end there-r of being engaged by the spring 37 that cooperates with Vthe lug 38 carried by the adjacent arm section 6 that normally tends to move the upper end of the lever rod 35 away from the intermediate bar 3 for engagement with the rectangular frame 19 as shown in Fig. 4 for laterally shifting the file supporting block 18 to disengage the supporting block from theworm 15.

A frame structure is disposed above the hle blank elevating mechanism and embodies a cross head 39 carried by the upper end of each` perpendicular end bar 2, the

cross heads 39 being connected by horizontal side rails 40 spaced inwardly of the opposite ends of saidcross head, while a. shaft 41 is journaled in the ends of said cross head at the outer side of each connecting rail 40, the shafts 41 having spaced oppositely threaded portions 412 in Figs. 2 and 3, a gear wheel 42 is secured to adjacent ends of said shafts 41, while a As shown stub shaft 43 journaled in Vthe adjacent' Y cross head 39carries a gear 44 meshingV with the gears 42 and operable by a vhand wheel; 45. A support for a le cutter is associated with the oppositely threaded portion 41a of the shaft 41 at each side of the machine frame,'said support including perpendicular legs 46 carrying ylateral extension arms k47 at the lower ends thereof with a depending blade 51 flatly resting upon the guide 49` and properly retained in position thereon by the hinge '52 passing through said guard flanges and overlying the cutter bladeas clearly shown in Figs. 2 and 5. A cross bar 53 extending between the side rails 40 is provided with a. central opening surrounded by a guide flange 54 for the file blank F, the upper end of the le blank extending between the adjacent ends Vof the cutter blades 5l kas shown' in Fig. 1, while gua-rd fingers 55 adjustably carried by bracket eX- tensions 56 supported bythe inclined guides- 49 insure the centering o-f the file blank between the cutter blades. lEachV cutter blade is provided vadjacent the outer end thereof with an upstanding lug 57 and a pin extension 58 that is surrounded by a coil spring 59. A bracket arm 60 carried by the outer end of each guide 49 adjustably supports anY apertured screw plug 6l through which the cutter blade pin 58 eX- tends, the screw plug 61 engaging the outer end of the coil spring 59 forvarying the tension thereof to control the striking force upon the file blank Sl. Y

The operating mechanism for the cutter blades 51 embodies four perpendicularly eX- tending rods 62 su ported upon the base stand 1 with a cross siaft 63 journaled in the upper ends thereof above the bladefguides 49 as shown in Figs. 1 and 2. A finger 64 lis carried by each shaft 63 and upon rotation of said shaft is adapted to be moved into engagei'nent with the cutter blade lug 57 for retracting the cutter blade'against Y the tension of the spring 58. ,One lofthe shafts 63 is provided with an end pulley 65 e source* of po-wer while the shafts 63V areconnected vby a cross belt 67 passing overpulleys 68.

driven by a belt 66 from a suitab From the abovek detail description4 of the device, it isbelieved that'the construction and operationv thereof will at once be apparent, it being understood that when the supporting block 18 is in its loweredV position,-

a file blank S is mounted therein as illustrated in Fig. 1. By ro-tating the shaft 31 by the hand wheel 34, the arm 27 is' moved into friction engagement with the cylinder 24 of the block mechanism, against the tension of the springs 30 for operatively connecting the block 18 to the worm 15 as shown in Figs. l, 6 and 7. The file cutter guides 49 are transversely shiftable upon the screw shaft 4l for properly positioning the same relative to the upper end of the file F. Power applied to the shaft 7 will rotate the worm 15 and thereby elevate the block 18V supporting the file blank.4 Power applied to the pulley 65 will rotate the shaft 63 and cause the fingers 64 carried thereby to engage the cutter blade lugs 57 to retract the same against the tension of the springs 58 and when said fingers escape the lugs, the springs 58 forcibly return the cutting edges of said blade into engagement with the upper end of the file blank, it being understood lthat the blades 51 may be` angularly disposed as indicated in Fig. 2 for cutting the proper form of tooth upon the file blade. The tension of the spring 59 is regulated by the screw plugs 61 for controlling the striking force of the cutter blades relative to the file blank. The power devices for the shaft 7 and the shaft 63 are so timed as to permit a continuous cutting operation upon the file blank with each tooth of the file-blank even- Vly spaced. In removing the completed file from the machine, and when the file supporting block 18 is in its limit of upwardl movement, the shaft 31V is reversely rotated to permit the springs 30 to displace the arm 27 from fric-tional engagement with the adjacent end ofthe block cylinder 24, at which time the tensioned arm 35 engaging the rectangular frame 19 of the block supporting mechanism will shift said frame and block to disconnect the same from the Vworm 15, the block 18 then being lowered while the' cylinder 24 revolves upon the end 25 of said block in passing over the rack teeth 4a on the frame bar 4.

While there is herein shown and described.Y

the preferred embodiment of the present invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

What I claim is I v 1. In a file cutting machine, a frame structure including a plurality of4 perpendicular guide bars,y a :power operated perpendicular :worm shaft journaledin the frame structure, la verticallyshiftabl-e file blank supporting block guided bythe frame bars and capable of limited lateral"v movement,; av rectangularA frame carried by said block enclosing one kof the frame bars, an arm carried by said rectangular frame and having a swiveled head associated with the worm shaft,

a. cylinder rotatably supporting the opposite i side of said block, a, rack and gear' connection between said cylinder and an adjacent frame bar, a Screw adjusted plate engaging the cylinder formoving the swiveled head into engagement with the worm shaft, and

file cutting means associated with the upper end of the `frame structure.

2. In a file cutting machine, a frame structure including a plurality of perpendicular guide bars, a power operated perpendicular worm shaft journaled in the frame structure, a vertically shiftable file blank supporting block guided by the frame bars and capable of limited lateral movement, a rectangular frame carried by said block enclosing one ofthe frame bars, an arm carried by said rectangular frame and having a swiveled head associated with the worm shaft, a cylinder rotatably supporting the opposite side of said block, a rack andv gear connection between said 'cylinder 'and anvadjacent `frame bar, a screw adjustable plate engagin the cylinder for moving the swiveled hea into engagement with the with the upper end of the frame structure,

and a tensioned lever arm extending through c,

the rectangular frame adapted to shift the 'same andthe file blank supporting block to disengage the swiveled head from theV worm shaft when the screw operated plate 1s dlsplaced from engagement with said cylkinder.

3. In a file cutting machine, a frame structure,.a le blank supporting block verojo tically shiftable in the frame structure, laterally adjustable cutter blade supporting guides associated with the upper end of the frame structure, Ysaid guides including screw shafts journaled upon the frame structure forv supporting the guides, a cutter blade I 100 worm shaft, file cutting means associated frame structure, said guides .including screW shafts journaled upon the frame structure for supporting the guides, a cutter blade resiliently mounted in each guide, a projecting lug carried by each cutter blade, and striker means associated with the cutter blade lug for retreating the same against the spring tension thereon and subsequently disengaged therefrom to permit tensioned movement of the cutter blades in directions toward the 10 file blank, and means for varying the tension on the cutter blades.v

In testimony whereof` I afX my si nature.

' SAM KAR AL. 

